Double Star Calculator - Orbit

Orbital Elements for COU567

WDS:	COU567	WDS ID/Discoverer
P:	135.400	Orbital period (years)
a:	0.187	Semi-major axis (arcseconds)
i:	109.8	Inclination (degrees)
Ω:	5.3	Longitude of ascending node (degrees)
T:	2002.000	Epoch of periastron passage (year)
e:	0.84	Eccentricity
ω:	108.7	Longitude of periastron (degrees)
Start-Year:	1957.3	Year
End-Year:	2092.7	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for COU567
Position:	042948.12+174039.4	Epoch-2000 right ascension and declination
WDS-ID:	04298+1741	WDS designation
Discoverer Code:	COU567	Discover designation and components
ADS number:	.	Aitken Double Star catalog
HD number:	28436	HD catalog number
Hipparcos number:	20971	Hipparcos catalog number
V1:	9.37	Magnitude of the primary
V2:	8.09	Magnitude of the secondary
Equinox:		Equinox
Date:		Date of last observation
Orbit grade:	4	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:		Flags
Ephemerides:		Ephemerides
Code:	BAE2021	Reference

Double Star Orbit for COU567

WDS 6th Orbit including measures of COU567

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of COU567

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.084   108.42
--------------------------
1957.30    0.180    36.68
1958.30    0.181    36.15
1959.30    0.181    35.63
1960.30    0.181    35.11
1961.30    0.182    34.59
1962.30    0.182    34.08
1963.30    0.182    33.56
1964.30    0.182    33.04
1965.30    0.182    32.52
1966.30    0.182    32.01
1967.30    0.181    31.49
1968.30    0.181    30.97
1969.30    0.180    30.44
1970.30    0.180    29.92
1971.30    0.179    29.39
1972.30    0.178    28.85
1973.30    0.178    28.31
1974.30    0.177    27.77
1975.30    0.175    27.22
1976.30    0.174    26.66
1977.30    0.173    26.09
1978.30    0.171    25.51
1979.30    0.169    24.92
1980.30    0.167    24.32
1981.30    0.165    23.70
1982.30    0.163    23.07
1983.30    0.161    22.42
1984.30    0.158    21.74
1985.30    0.155    21.04
1986.30    0.152    20.31
1987.30    0.148    19.55
1988.30    0.144    18.75
1989.30    0.140    17.90
1990.30    0.135    16.99
1991.30    0.130    16.02
1992.30    0.124    14.96
1993.30    0.118    13.79
1994.30    0.111    12.48
1995.30    0.103    10.98
1996.30    0.093     9.20
1997.30    0.083     7.00
1998.30    0.070     4.08
1999.30    0.055   359.72
2000.30    0.037   351.38
2001.30    0.015   319.53
2002.30    0.020   210.80
2003.30    0.038   188.92
2004.30    0.050   180.29
2005.30    0.058   174.49
2006.30    0.063   169.81
2007.30    0.066   165.70
2008.30    0.069   161.94
2009.30    0.070   158.39
2010.30    0.072   155.00
2011.30    0.073   151.71
2012.30    0.073   148.51
2013.30    0.074   145.37
2014.30    0.075   142.28
2015.30    0.075   139.24
2016.30    0.076   136.24
2017.30    0.076   133.29
2018.30    0.077   130.38
2019.30    0.078   127.51
2020.30    0.078   124.69
2021.30    0.079   121.92
2022.30    0.080   119.20
2023.30    0.081   116.54
2024.30    0.081   113.93
2025.30    0.082   111.39
2026.30    0.084   108.91
2027.30    0.085   106.49
2028.30    0.086   104.13
2029.30    0.087   101.85
2030.30    0.088    99.63
2031.30    0.090    97.47
2032.30    0.091    95.39
2033.30    0.093    93.36
2034.30    0.094    91.41
2035.30    0.096    89.51
2036.30    0.097    87.68
2037.30    0.099    85.91
2038.30    0.101    84.20
2039.30    0.102    82.54
2040.30    0.104    80.94
2041.30    0.106    79.39
2042.30    0.108    77.90
2043.30    0.110    76.45
2044.30    0.111    75.05
2045.30    0.113    73.69
2046.30    0.115    72.38
2047.30    0.117    71.11
2048.30    0.119    69.88
2049.30    0.121    68.69
2050.30    0.122    67.53
2051.30    0.124    66.41
2052.30    0.126    65.32
2053.30    0.128    64.26
2054.30    0.130    63.23
2055.30    0.132    62.23
2056.30    0.134    61.26
2057.30    0.135    60.32
2058.30    0.137    59.39
2059.30    0.139    58.50
2060.30    0.141    57.62
2061.30    0.142    56.77
2062.30    0.144    55.94
2063.30    0.146    55.12
2064.30    0.147    54.33
2065.30    0.149    53.55
2066.30    0.151    52.79
2067.30    0.152    52.05
2068.30    0.154    51.32
2069.30    0.155    50.60
2070.30    0.157    49.90
2071.30    0.158    49.22
2072.30    0.160    48.54
2073.30    0.161    47.88
2074.30    0.163    47.23
2075.30    0.164    46.59
2076.30    0.165    45.96
2077.30    0.167    45.34
2078.30    0.168    44.73
2079.30    0.169    44.12
2080.30    0.170    43.53
2081.30    0.171    42.94
2082.30    0.172    42.37
2083.30    0.173    41.79
2084.30    0.174    41.23
2085.30    0.175    40.67
2086.30    0.176    40.12
2087.30    0.177    39.57
2088.30    0.178    39.02
2089.30    0.178    38.48
2090.30    0.179    37.95
2091.30    0.180    37.42
2092.30    0.180    36.89

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 15:25:08